How do you create your comment.?Do you use the framework gmf, by using palette creation command?

Or do you execute a semantic command and then do you call the drop command?

It could be important, because commands are executed in the context of a transaction.

Notifications have been done only at this end of the transaction.
In the case of the framework of gmf (transaction contains semantic creation +view creation) So it can be the reason that you see only the comment after the view creation.